The postcard below was contributed by Bruce Webbe whilst researching his family history. He adds (possibly the wording on the other side of the card):

The Union meets about every three years. Each meeting is in a different location in the world. In 1947 the 11th International Vegetarian Union
Congress took place at Wycliffe College in Stonehouse, England. Earnest Albert Webbe, depicted in the lower left corner, attended the meeting as a delegate.

The photos below are two halves of the same wider picture, sent by
Jan Stastny in Prague: